Improvement in molds for casting plow-points



HENRY J. BRUNNER. improvement in Molds for Casting P!ow-P0ints.

N0.126,015. F Pate NITED STATES HENRY J. BRUNNER, OF NAZARETH, PENNSYLVANIA.

IMPROVEMENT IN MOLDS FOR CASTING PLOW-POINTS.

Specification forming part of Letters Patent No. 126,015, dated April 23, 1872,

To all whom it may concern.-

Beit known that I, HENRY J. BRUNNER, of Nazareth,-in the county of Northampton and Statev of Pennsylvania, have invented an Improved Mold and. Process for Casting Plowshares and Points; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing making part of this specification- Figure 1 being a top view of the improved mold; Fig. 2, a front view of the same Fig. 3, a view of the inside of the back part of the mold with a plowshare therein 5 Fig.4, a transverse section of the mold with a plowshare therein in a plane indicated by the line a a: of Figs. 1 and 2; Fig. 5, an inside view of one part of a double slide for the mold to cast loops and rin gs; Fig. 6, a central section of the double slide in connection with the adjacent part of the mold.

Like letters designate corresponding parts in all of the figures.

My invention consists in an improved iron or chill mold and method of casting therein, by whichnot only plowshares,points, and other thin plow-castings are produced with chilled edges and surfaces, but whereby they are cast much more rapidly and cheaply, and of more perfect form, and with a smoother surface than can be cast in sand-molds, all as hereinafter specified.

The mold is formed of three main parts for casting plowshares, of which the back piece A covers the entire side, and is attached fixedlyto a post, D, at a convenient height above the ground or floor, and in an upright position, as shown, so that the edges of the plowshare E, Fig. 3, are formed in a vertically-edgewise position, and preferably with the point and sharp edge downward. The next main .part B covers all the lower edge and rear end of the share as far forward as the hook-projection a thereof, (when the share is made with such a projection,) and reaches back over the upper edge of that part of the share, and rests upon a ledge,

1), Figs. 3 and 4, of the back part A, so as to be sustained in position thereby. The other main part, 0, of the mold covers the front and upper part of the share, and rests upon the ledge b of the part A and upon the part B. It has a projection, which forms the space behind the book a of the share, from which, by being separate from the part B, it is drawn upward as well as from the hook or dovetail 0 under the point of the share. A jog, d, in the lower edge of this part, fitting over a corresponding jog in the upper edge of the part B, substantially as shown, holds the two parts from separating laterally. The parts B O are held to the part A by cl amp-rods f f, tightened by nuts or thumb-screws h h, and held in lugs g g of the part A, substantially as shown. The two parts B G are also held together by hookclampsz' i fitting in notches j j in the surfaces thereof. These clamps are all readily disengaged for taking apart the mold.

The gate 1 is formed between the parts A G, i

and may have a removable lining, m, to be replaced in case of melting when pouring the metal. The sides of the gate at the bottom project inward a little beyond the adjacent edges of the mold, so that when the metal is poured it does not strike the edges of the mold to endanger their melting, and so that the gate pieces of the castings will break oif without breaking into the casting itself.

By the foregoing construction and arrangement of the mold the metal is poured in at one edge of the mold and quickly runs down to the point and sharp edge of the share, so that it fills the mold perfectly by its undiminished fluidity, its pressure, and its motion, thereby insuring perfect castings where it is most necessary and where they are most liable to be imperfect by the ordinary mode of casting. And another vital advantage in this method is that the metal, after filling at the lower edge, continues to fall upon the melted metal already poured in, and never falls against the sides of the mold, which would melt metallic molds under the gate if otherwise placed.

Ihave shown h0w,bytheuse ofthetwo removable parts B O of the mold, a hook-projection, a, as well as the dovetail c of the point, is cast. I have a device by which any number of hookprojections may be cast in the mold, as shown, at the rear end, for forming the hook it, found on some plowshares, for attaching to the moldboard of the plow. This device is a slide, G, fitting in an aperture, p, Fig. l, in one part of the mold, or between two of the parts. This slide, when the share has been cast, is drawn out by a handle, 0'. The slide is of such form at its inner end as to produce the form of hook desired.

On a similar principle any cavity or hole is cast in the share, such as the countersink-hole 8, Figs. 3 and 4, to receive the head of a bolt for attaching to the mold-board. A slide, H, enters an aperture through the side of the part A of the mold, as shown; and in this case, the slide being light and lying horizontally, so that its weight cannot hold it securely in position, a sprin g-holder, t, is employed for the purpose.

In order to cast a loop or perforated projection on the share or casting, I use a slide formed in two parts, I I, as shown in Figs. 5 and 6. The halves have cavities u a, which. when together, will form a complete loop, v, Fig. 6. The two parts will be held together in place in the aperture of the mold which receives them and to secure them from any longitudinal displacement they may be coupled together by a pin, w, or its equivalent, passing through both. This pin also has a projection, y, to hold the parts in position in the mold. If this double slide enters through one of the mold parts, as shown, it must be inserted from the inside, being a little tapering for that purpose, in order that the mold may be taken apart, first by separating the main parts, then by drawing the slide out of its aperture with the share attached, and finally by separating the two parts of the slide. If this slide were in the edge of the mold part, or between two parts, it need not thus enter from the inside.

Sometimes the slide may be in three or more parts; but it can always be treated in like manner.

This double or compound slide neverbecomes displaced or moved from its proper position; whereas when casting in sand-molds this part, being separate, is frequently displaced in ramming the sand, so that the share comes out unfit for use.

There are thin projections z z projecting from the front sides of the movable parts B G of the mold to handle the parts by with tongs.

With the improvements above set forth I make chill-molds for casting plowshares and other thin plow-castings very successful in effect; and not only is the advantage of chilled castings obtained, but with these molds the metal can be poured and the casting taken out within one minute thereafter, and then the mold can be immediately put together and another share cast without delay. Thus, with twenty of these molds, four men can cast one thousand plowshares a day, whereas with sandmolds the same number of men can mold not more than one hundred plowshares a day. Besides,with the iron-molds, the castings come out clean and bright, perfect in form and ready for use; but those castin sand-molds require to be scraped and cleaned to get off the burnt sand adhering thereto, and are not so perfect in form, nor so smooth.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A metallic mold for casting plowshares and other plow-castin gs, composed substantially of a fixed part, A, and movable parts B G, constructed and combined substantially as and for the purpose herein specified.

2. I also claim slides G and H, inserted through apertures in the mold parts, and held in place either by gravity or springs, for easting holes in and catches on the castings, as herein specified.

3. I also claim, in a metallic mold for easting plowshares, as described, inserted slides, composed of two ormore pieces, I I, for casting loops, rings, hooks, or other perforated or hollow projections on the castings, as herein specified.

at. I also claim the removable gatelining on when projecting inwardly over the edges of the mold cavity, as herein set forth.

5. I also claim the method of casting plow shares in chill-molds,.when constructed substantially as herein specified.

Specification signed by me this 24th day of October, 1870.

HENRY J. BRUNNER.

Witnesses:

THOMAS UHLER, JAMES P. GROSS. 

